Electrical massage apparatus.



' S. W. HILL&

ELECTRICAL MASSAGE APPARATUS. APPLICATION FILED MAR. 6. 19m.

1334363.- PatentedJuly31,1917.

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Be it niowntha't I, SAMUEL W. Hints, a citizen of the United States of America, re-

sidingat Jerome, in the county of Lincoln .andYStateofIdaho, have invented certain new-and useful Improvements in Electrical Massage Apparatus, of which the following is a specification.

My invention relates to electrical vibratorymassage apparatus. and more particularly to an improved type of reciprocating motor adapted for use withalternating or interrupted direct-current.

The primary objects of the invention are to provide a reciprocating motor in which means has been devised for regulating and controlling the amplitude of the vibrations, particular regard being had to the facility with which the magnetic fields may be changed with respect. to the armature; to

provide an armature in combination with.

an electromagnet, the armature being so arranged that it will vibrate to its maximum and minimumextent without setting up any jerking movements or trepidations; and to provide a massage apparatus of the character described which is extremely simple in construction and arrangement. and which will admit of the device being manufactured at a lowfigure.

To the accomplishment of the recited objects, andothers coordinate therewith the preferred embodiment of my invention resides in that construction and arrangement shown in the accompanying drawings, described in the specification, and embraced within the scope of the appended claims.

In said drawings Figure 1 is a perspective view of the device embodying my invention.

Fig. 2 is a central longitudinal 'section of the apparatus.

tromagnet, while the other shell sustains the tool holder which is carried by an armature securely held in pro er relation to the said electromagnet at the point of connection of the two sections. The pole or core of the electromagnet is movable relatively to its winding and the armature by means of a desired adjustment, as

' v nnncrnrcar. MAssAsn ArrAnA'rns.

Patented July 31, 1917;

Application filed March a, 19 1s. Serial no. 22,948.

setscrew which extends through the bottom of lts corresponding shell and its supporting base in easily accessible position. The armature is located in direct vertical alinement with the magnet core and is supportedupon diametrically opposite sides by a comparatively thin diaphragm. the tool holder rising vertically from the center of the armature and protruding through the upper shell section. In conjunction with the shell, considered-as an entirety, I connect a suitable handle provided with a switch and appropriate electrical connections. Referring more specifically to the drawlugs for a more detailed description of my invention, the numeral 5 designates a shell comprising a lower section 6 and an upper section 7, rabbetedand detachably secured together at their adiacent' edges by complemental screw threads as at 8. The lower section 6 contains an electromagnet comprising a winding 9 and a central core 10 which 'is movable relatively to the winding and carries a set screw 11 for effecting its willbe presently explained. In this connection it will be pointed out that the base diametrically opposed vertical keys or flanges 11" engageable with the complementary slots 12. in the core, and the screw 11 is swiveled as at 12" relative to the thin disk 13. The armatureconsists of a soft metal disk 12 supported at diametrically opposite points by a spring steel diaphragm 13, the portions .of the diaphragm contiguous the armature being of less transverse extent than the'outer extremities, the marginal edges of which are adapted to be interposed between the adjacent ends of the shell sections 6 and 7. as at 14. Manifestly, the armature lies in vertical alinement with the axis of the core 10, and rising in the same direction, and preferably carried thereby. is a. tool holder 15 protruding through the bushing 16 of the upper shell section. Any suitable conventional type of tool as 17 may be attached to the free end of this tool holder.

The entire shell is supported by an arm 18 which extends from one end of the handle 19, which is provided with the usual electrical connections 20 and a switch 21.

Upon depressing the switch 21 and thereof the shell 6 is cut away at 11' to allow for the maximum 1 brations which are longer in stroke.

by energizing the electromagnet, the armature 12 will obviously be caused to rapidly vibrate with respect to its magnetic field which is determined by the position of the core 10. By arranging thesaid core in from the armature the same will set iip yi- Re gardless of the particular adjustment of the core, it will appear evident that the reciprocations of the armature are only limited by its own inherent resiliency, thereby eliminating absolutely any sudden shocks or metallic abutments.

\Vhat I claim is: j 1. In an electrical massage apparatus, the combination of a casing, an electromagnet {provided with a core, a substantially. circuhr armature of soft metal in operative rela- -tion'to,- and havinga diameter coextensive with the diameter of the core, a diaphragm comprising a pair of dove-tail shaped spring steel members carried upon diametrically opposite sides of the armature and arranged medially of and in the same plane with said provided with a frictionally held between the casing and the v closure, and a tool holder mounted upon said armature. V

2. In an electrical massage apparatus, the combination of a casing, an electromagnet 7 core, a substantially circular armature of soft metal in operative rela tion to, ahdlhaving a diameter coextensive with thediameter of the core, a diaphragm comprisilw a pair of dovetail shaped spring steel mem are carried upon diametrically opposite sides of the armature and arranged medially of and in the same plane with said armature, a rotund closure for said casing having a central opehmg-prov1ded with a guide bushing, the outer edges of said diaphragm'menibers being frictionallyheld between the casing and the closure, and a verticaltool holder on the top of said'armature' and projecting through said bushing;

In testimony whereof I ailix my) signature in the presence of two witnesses.

. SAMUEL W. HILLS.

,W'itnesses: v

N. "Currie LA-MMOND, "NrimaM T. Jones. 

